Shanghai ShengQiu Materials Co., Ltd

StuddedTube/Pipe   Studs are fully automatically welded onto the plain tube by resistance welding. The shapes of studs are cylindrical or elliptical.   Due to their high rigidity, studded tubes can be used even under extreme temperature and pressure conditions, as furnace, chemical, petrochemical industry and power station etc.   Tube materials: carbon steel, stainless steel, Alloy steel can be applied. Fin material: carbon steel, stainless steel   Welcome send us inquiry for quotation at any time.   Shanghai ShengQiu Materials Co., Ltd WhatsApp: 008613761124029 Email: sales@sqsteelpipe.com Website: www.sqsteelpipe.com

Square/RectangularWelding Fin Tube (“H”/”HH” Type)   Square or Rectangular fins are welded onto ONE steel base tube. We call it 'H' fin Tube. Square or Rectangular H Fins are welded onto TWO steel base tube. We call it 'HH' or 'DOUBLE H' Fin Tube.   The Square or Rectangular H/HH Finned Tube quality is assured by hydrostatic or pneumatic tests, eddy current tests and tensile tests in order to verify the mechanical bonding between inner tubes and outer fins.   Square/Rectangular Welding Fin Tubes are used in economizers, boilers, marine boilers etc… Operation temperature: 550 ℃ max. Tube materials: carbon steel, stainless steel, Alloy steel can be applied. Fin material: carbon steel, stainless steel   Welcome send us inquiry for quotation at any time.   Shanghai ShengQiu Materials Co., Ltd WhatsApp: 008613761124029 Email: sales@sqsteelpipe.com Website: www.sqsteelpipe.com  

High FrequencyWelding Fin Tube (“HFW” Type)   The fin strip is welded continuously and spirally wound onto a polished plain tube. And the tube and fins are bonded together by using high frequency resistance welding technique. This manufacturing method ensures high heat transfer coefficient and a perfect contact between plain tube and fins.   The welded fins could be solid and serrated. And also, all helical welded tubes could be BENT in the middle or at both ends; we call it 'Hairpin' tubes.   Welded finned tubes are used in fired heater, economizers, boilers, pre-heaters etc… Operation temperature: 550 ℃ max. Tube materials: carbon steel, stainless steel, alloy steel can be applied. Fin material: carbon steel, stainless steel   Welcome send us inquiry for quotation at any time.   Shanghai ShengQiu Materials Co., Ltd WhatsApp: 008613761124029 Email: sales@sqsteelpipe.com Website: www.sqsteelpipe.com

KLFin/Knurled Footed Fin Tubes (“KL” Type)   The 'KL' fin Tube is developed from the L fin tube. The root of fins is knurled simultaneously with inner tube, thus ensuring the tight contact between fins and plain tube. The KL fin tubes are preferred when used in slightly more aggressive conditions for increased higher temperatrure and enchaned the corrosion protection to the outside wall of the tube.   Operation temperature: 250 ℃ max. Tube materials: carbon steel, stainless steel, copper or any metal can be applied. Fin material: Aluminum, copper and carbon steel.   Welcome send us inquiry for quotation at any time.   Shanghai ShengQiu Materials Co., Ltd WhatsApp: 008613761124029 Email: sales@sqsteelpipe.com Website: www.sqsteelpipe.com

LLFin/Overlapped Footed Fin Tubes (“LL” or “DL” Type)   The fin strip is folded into a DOUBLE L shape, and wound onto the base tube surface under tension, the feet of the fins are joined together and cover the finned surface. This LL fin shape is much more efficiently protected by con.   Operation temperature: 175 ℃ max. Tube materials: carbon steel, stainless steel, copper or any metal can be applied. Fin material: Aluminum, copper and carbon steel.   Welcome send us inquiry for quotation at any time.   Shanghai ShengQiu Materials Co., Ltd WhatsApp: 008613761124029 Email: sales@sqsteelpipe.com Website: www.sqsteelpipe.com

L Fin/ Tension WoundFin Tubes (“L” Type)   The fin material is folded to form a 'L' shape and then tension wound around the base tube. The feet of the fins are joined together and cover the whole of the finned surface.   Operation temperature: 150 ℃ max. Tube materials: carbon steel, stainless steel, copper or any metal can be applied. Fin material: Aluminum, copper and carbon steel.   Welcome send us inquiry for quotation at any time.   Shanghai ShengQiu Materials Co., Ltd WhatsApp: 008613761124029 Email: sales@sqsteelpipe.com Website: www.sqsteelpipe.com

Extruded BimetalFinned Tubes (“DR” Type)   A clean plain tube is inserted into an aluminum sleeve. The fins are extruded from this sleeve around the tube. In this process, the inside diameter of the sleeve is reduced and the sleeve is pressed onto the core plain tube. This process produces a strong bond contact with excellent heat transfer coefficient. The extruded fins could be solid and serrated. Aluminum finned tubes are used in steam air heater, condensers, air fin coolers etc… Operation temperature: 300 ℃ (Max) Tube materials: carbon steel, stainless steel, copper or any metal can be applied. Fin material: Aluminum (Grade 1100/1060/6063 etc)   Welcome send us inquiry for quotation at any time.   Shanghai ShengQiu Materials Co., Ltd WhatsApp: 008613761124029 Email: sales@sqsteelpipe.com Website: www.sqsteelpipe.com  

Shanghai ShengQiu Materials Co., Ltd can supply Finned Tube s: DR(Extruded)/L(Wrapped)/LL(Overlapped)/KL(Knurled)/G(Embedded)Fin Tube, High Frequency welding Fin Tube, Studded Tube, H/HH(Square) Fin Tube, Longitudinal Fin Tube, Low Fin Tube.   Application: used for air cooler, fired heater, heat exchanger, marine boiler, economizer, power plant boiler, HRSG boiler, waste heat recovery unit, air heater etc.   Our end user are mainly from Power Plant, Refinery & Petrochemical, Offshore & Marine.   Welcome send us inquiry for quotation at any time. Shanghai ShengQiu Materials Co., Ltd WhatsApp: 008613761124029 Email: sales@sqsteelpipe.com Website: www.sqsteelpipe.com

Shanghai ShengQiu has exported finned tubes successfully and the following table shows the details of these finned tubes: Tube Size: 25MM x 2.5MM x 9000MM Tube Material: SB163 N04400 Fin Material: AL99.5 Fin OD: 58MM Fin Thickness: 0.4MM Fins/Meter: 400PCS/Meter Fin Pitch: 2.5MM Fin Type: Embedded G   Don’t hesitate to contact us at any time for good price. Finned tubes are the main components of heat exchangers.  They are a series of tubes where fins have been added on the outside to increase the contact area with the outside fluid, to exchange heat and between the fluid inside the tube and the fluid outside the tube. Finned tubes are elongated aluminium cladded carbon steel flat tubes with brazed aluminium fins.   Why use finned tubes? Finned tubes are used in applications involving the transfer of heat from a hot fluid to a colder fluid through a tube wall. The rate at which such heat transfer can occur depends on three factors: (1) the temper...